MF-12S D2/D4 - Subwoofer Deaf Bonce - Free user manual and instructions

Product Type	Subwoofer
Brand	Deaf Bonce
Model	MF-12S D2/D4
Size	12 inches (30 cm)
Impedance	Dual 2 Ohm or Dual 4 Ohm (selectable)
RMS Power Handling	1500 Watts
Peak Power Handling	3000 Watts
Frequency Response	20 Hz - 200 Hz
Sensitivity	86 dB (1W/1m)
Voice Coil	3-inch high-temperature aluminum
Magnet Material	Ferrite
Cone Material	Paper with rubber surround
Mounting Depth	7.5 inches (190 mm)
Cut-Out Diameter	11.1 inches (282 mm)
Recommended Sealed Box Volume	1.25 - 1.75 cubic feet (35 - 50 liters)
Recommended Ported Box Volume	2.0 - 2.5 cubic feet (56 - 70 liters)
Net Weight	13.2 kg (29 lbs)
Warranty	1 year
Cleaning Instructions	Wipe gently with dry cloth; avoid liquids or solvents
Safety Precautions	Ensure proper ventilation; do not exceed RMS power rating; disconnect power when not in use
Spare Parts Availability	Contact authorized dealer for replacement voice coils, cones, and gaskets

Frequently Asked Questions - MF-12S D2/D4 Deaf Bonce

What is the difference between the D2 and D4 versions?

The D2 version has dual 2-ohm voice coils, allowing wiring to 1 ohm or 4 ohms. The D4 version has dual 4-ohm voice coils, allowing wiring to 2 ohms or 8 ohms. Choose based on your amplifier's stable impedance.

How do I break in my new Deaf Bonce MF-12S subwoofer?

Play music at moderate volume (50-70% of RMS) for 10-20 hours. Avoid clipping. This loosens the suspension and improves low-frequency response.

What enclosure type is best for this subwoofer?

Both sealed and ported boxes work. A sealed box (1.25-1.75 cu ft) provides tight, accurate bass. A ported box (2.0-2.5 cu ft tuned to 34-38 Hz) yields higher output and deeper extension.

Can I wire the D2 version to 1 ohm?

Yes, by connecting the voice coils in parallel (positive to positive, negative to negative) you get a 1-ohm load. Ensure your amplifier is stable at 1 ohm.

What is the recommended amplifier power?

Use an amplifier that delivers 1000-1500 Watts RMS at the final impedance load. Avoid underpowering or clipping, which damages the voice coil.

How do I set the gain correctly?

Set the amplifier's gain to match the head unit's output. Use a multimeter or oscilloscope to avoid clipping. Play a test tone at 50 Hz and adjust until the voltage matches the square root of (power x impedance) for your target RMS.

What causes distortion from my subwoofer?

Common causes: clipping from the amplifier, overpowering, incorrect enclosure size, or a loose connection. Lower the gain or check the wiring.

Is it safe to use this subwoofer in a ported box?

Yes, as long as the port tuning frequency is below 40 Hz and the box dimensions match recommendations. Ensure the port area is adequate to avoid chuffing.

How do I clean the subwoofer cone?

Gently wipe the cone and surround with a dry microfiber cloth. Do not use water, chemicals, or compressed air as they may damage the materials.

What should I do if the subwoofer stops working?

Check all wiring connections, amplifier settings, and fuses. Test the voice coil with a multimeter for continuity. If open or shorted, consult a professional for cone replacement.

USER MANUAL MF-12S D2/D4 Deaf Bonce

MF-08S D2/D4

MF-10S D2/D4

MF-12S D2/D4

MACHETE SERIES

CONTENTS

1. Introduction
2. Safety instructions
3. Wiring diagrams
4. Recommended enclosure parameters
5. How to use
6. Specifications
7. Dimensions
8. Box contents
9. Warranty and maintenance info
10. Information on disposal of the electrical and electronic equipment (for the European countries with separate waste collection)

GLOBAL SPONSOR

1. INTRODUCTION

EN

Thank you for purchasing of this Deaf Bonce product! Our company is committed to the creation of extremely loud sound systems with no loss of quality.

To ensure proper use, please carefully read through this manual before using this product. It is especially important that you read and observe caution's in this manual. Please keep the manual in a safe and accessible place for future reference.

2. SAFETY INSTRUCTIONS

1. Fasten the subwoofer properly when installing it in the vehicle. If the component is disconnected during driving, it may cause serious damage to the passengers of the vehicle or another vehicle.
2. Before installing the components, if possible store the product in its original package to avoid accidental damage to the product.
3. Be careful when installing and dismantling the subwoofer! Do not let the subwoofer drop to avoid damage of its moving parts.
4. When working with tools follow safety rules.
5. Before the installation switch off the head unit and all other audio devices to avoid their damage.
6. Make sure that the location of the subwoofer does not hinder the proper operation of mechanical and electrical devices of the vehicle.
7. Do not install components in places exposed to water, excessive humidity, high or low temperature, dust or dirt. ATTENTION!!! The product may be operated at +5 °C (41F) to +40 °C (104F). In case of moisture condensation, let the product to dry.
8. When performing plumbing, drilling or cutting works with the car, make sure that there is no wiring, brake lines, fuel pipe or other structural elements under the place of work. Follow the safety rules! Use protective glasses and gloves.
9. When stretching back the speaker cables make sure that they are not in contact with sharp edges or moving mechanical devices. Make sure that they are firmly fixed and protected over the entire length.
10. The diameter of the speaker cables must be selected in accordance with the length and applied power.
11. Never stretch the cables outside of the car and near the moving parts of the car. This can lead to destruction of the insulating layer, short circuit and fire.
12. To protect the cables use rubber gaskets if the wire passes through a hole in the plate, or other similar materials if it lies close to the parts exposed to heat.

CAUTION!!! High sound pressure can damage your health!

Please use the common sense when controlling volume!

3. WIRING DIAGRAMS

Attention! You need to connect both voice coils of the subwoofer.

Do not expose your amplifier to loads below the value predetermined by the manufacturer.

Various examples of connection types are given at the pages below. Use these examples to determine the required load impedance of your connection.

Connection of terminals

Serial connection

Total impedance = ΩSub 1 + ΩSub 2 + ΩSub 3 ...

Parallel connection

EN

Total impedance = 11 Sub 1 + 1 Sub 2 + 1 Sub 3

Schemes of enabling the load of the subwoofer

Voice coils 2+2,4+4 Ohm

The subwoofer has voice coil D2 or D4.

One subwoofer, coils in series

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Voice coils	Total impedance
2+2 Ohm	4 Ohm
4+4 Ohm	8 Ohm

One subwoofer, coils in parallel

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Voice coils	Total impedance
2+2 Ohm	1 Ohm
4+4 Ohm	2 Ohm

Subwoofers in series, coils in parallel

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Voice coils	Total impedance
2+2 Ohm	2 Ohm
4+4 Ohm	4 Ohm

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Voice coils	Total impedance
2+2 Ohm	3 Ohm
4+4 Ohm	6 Ohm

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Voice coils	Total impedance
2+2 Ohm	4 Ohm
4+4 Ohm	8 Ohm

EN

Subwoofers in series, coils in series

Diagram of a speaker system with two speakers and a central podium (no text or labels)

Voice coils	Total impedance
2+2 Ohm	8 Ohm
4+4 Ohm	16 Ohm

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Voice coils	Total impedance
2+2 Ohm	12 Ohm
4+4 Ohm	24 Ohm

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Voice coils	Total impedance
2+2 Ohm	16 Ohm
4+4 Ohm	32 Ohm

Subwoofers in parallel, coils in series

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Voice coils	Total impedance
2+2 Ohm	2 Ohm
4+4 Ohm	4 Ohm

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Voice coils	Total impedance
2+2 Ohm	1.33 Ohm
4+4 Ohm	2.66 Ohm

Voice coils	Total impedance
2+2 Ohm	1 Ohm
4+4 Ohm	2 Ohm

Subwoofers in parallel, coils in parallel

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Diagram of four speakers arranged in a row with circuit connections (no text or labels)

Voice coils	Total impedance
2+2 Ohm	0.5 Ohm
4+4 Ohm	1 Ohm

Voice coils	Total impedance
2+2 Ohm	0.33 Ohm
4+4 Ohm	0.66 Ohm

Voice coils	Total impedance
2+2 Ohm	0.25 Ohm
4+4 Ohm	0.5 Ohm

CAUTION!!! High sound pressure can damage your health!

Please use the common sense when controlling volume!

Use the table below to select the desired diameter based on the length and the power consumption.

4. RECOMMENDED ENCLOSURE PARAMETERS

3D diagram of a rectangular box with an oval cutout and labeled dimensions (H, W, L) — no text or symbols present.

Bass reflex box
L*W*H = body volume

Model	MF-08S	MF-10S	MF-12S
The recommended volume, liters / ft ^3	23 / 0.8	40 / 1.4	50 / 1.8
Port area, cm ^2 / inch ^2	65 / 10.1	80 / 12.4	150 / 23
Port length, cm / inch	45 / 17.7	35 / 13.8	62 / 24.4
Port setting, Hz	39	37	35

5. HOW TO USE

The correct choice of the amplifier, its settings and enclosure design prolongs the lifetime of your subwoofer. You should select an amplifier with a nominal power below the nominal power of the subwoofer. Proper coordination of the head unit (HU) with the amplifier will provide clean, undistorted signal fed to the subwoofer, which prevents overheating and voice coil damage. Like any other speaker the subwoofer has moving and stationary parts. We strongly recommend that the moving parts of the subwoofer should be warmed up at the beginning of operation. Be extra careful when warming up the parts. Warm up the subwoofer using musical material for 40 hours at medium power. If you feel strange smell during operation at maximum volume, you should lower the volume of the subwoofer and let the device to cool down at a low volume.

Recommended settings of the amplifier and HU: Volume of HU should not exceed 80%. The amplifier sensitivity should be set to 50%, subsonic filter frequency (Subsonic) should be set to 5 Hz below the port settings. For example, if you configure the port at 30 Hz, Subsonic should be set to 25 Hz. The low pass filter LPF (the filter that cuts all frequencies above those set for the filter) should be set to 63-80 Hz, bassboost should be set to 0.

1. SPECIFICATIONS
   EN

Model	MF-08S D2/D4	MF-10S D2/D4	MF-12S D2/D4
Size (Inch)	8	10	12
Surround material	Foam	Foam	Foam
Cone material	Pressed paper	Pressed paper	Pressed paper
Frame material	Stamped steel	Stamped steel	Stamped steel
Magnet type	Ferrite	Ferrite	Ferrite
Power RMS (W)	600	800	800
Power MAX (W)	1200	1600	1600
Voice coil size (Inch)	2	2.5	2.5
Voice coil wire	Copper	Copper	Copper

THIELE-SMALL PARAMETERS

Impedance (Ohm)	2+2 / 4+4	2+2 / 4+4	2+2 / 4+4
Re (Ohm)	1.8+1.8 / 3.6+3.6	1.8+1.8 / 3.6+3.6	1.8+1.8 / 3.6+3.6
SPL (dB)	84 / 84.3	84 / 84.1	86 / 87
Xmax (mm)	12	14	14
Fs (Hz)	48 / 48.2	36 / 36.3	35 / 38
Vas (L)	7.5 / 7.9	20.5 / 20.8	36.5 / 34.3
Qts	0.41 / 0.42	0.45 / 0.46	0.49 / 0.51
BL	15.1 / 15.4	18 / 18.2	18.5 / 21.5

This specified sensitivity is not directly connected with the sound pressure in the vehicle and therefore should not be used as the sole indicator for comparison with other subwoofers.

MF-08S

MF-10S

MF-12S

8. BOX CONTENTS

1. Subwoofer - 1 pc.
2. Owner's manual - 1 pc.
3. Warranty card - 1 pc.

9. WARRANTY AND MAINTENANCE INFO

EN

Deaf Bonce products are warranted against defects concerning materials and their manufacturing under normal functioning conditions.

While the product is under warranty, defective parts will be repaired or replaced at the manufacturer's decision. The defective product, along with notification about it, must be returned to the dealer from which it was purchased together with the warranty certificate duly filled in, complete with the original packaging. If the product is no longer under warranty, it will be repaired at the current costs.

Our company does not undertake any liability for damages due to transportation. Our company does not take any responsibility for costs or loss of profit due to the impossibility to use the product, other accidental or consequential costs, expenses or damages suffered by the customer. Warranty according to laws in force. For more information visit our website and carefully read warranty card.

The manufacturer reserves the right to change design and specification without prior notice.

10. INFORMATION ON DISPOSAL OF THE ELECTRICAL AND ELECTRONIC EQUIPMENT (FOR THE EUROPEAN COUNTRIES WITH SEPARATE WASTE COLLECTION)

Items marked "crisscrossed wheeled bin" are not allowed to be disposed of together with usual household waste. These electrical and electronic products should be disposed of in special reception centers, equipped for recycling such products and components. For information about the location of the nearest disposal / recycling spot and the rules of delivery of waste please contact your local municipal office. Recycling and proper disposal helps to protect the environment and prevent harmful effects on health.

MF-08S

MF-10S

MF-12S

Manufacturer: Ningbo Sound Solution I&E Trading Co., Ltd Made in China

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Diagram of a speaker system with two speakers and an antenna (no text or labels)

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Diagram of four speakers arranged in a row with circuit connections (no text or labels)

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MF-10S

MF-12S

8. КОМПЛЕКТАЦИЯ

MF-08S

MF-10S

MF-12S